diff --git a/rwengine/src/loaders/LoaderIPL.cpp b/rwengine/src/loaders/LoaderIPL.cpp
index dbb3259a..deaebf9d 100644
--- a/rwengine/src/loaders/LoaderIPL.cpp
+++ b/rwengine/src/loaders/LoaderIPL.cpp
@@ -13,17 +13,20 @@
 
 #include "data/InstanceData.hpp"
 #include "data/ZoneData.hpp"
+#include "LoaderIPL.hpp"
+
 
 #include <rw/casts.hpp>
 
 enum SectionTypes { INST, PICK, CULL, ZONE, NONE };
 
-/// Load the IPL data into memory
 bool LoaderIPL::load(const std::string& filename) {
     std::ifstream str(filename);
-
     if (!str.is_open()) return false;
+    return load(str);
+}
 
+bool LoaderIPL::load(std::istream &str) {
     SectionTypes section = NONE;
     while (!str.eof()) {
         std::string line;
@@ -134,3 +137,4 @@ bool LoaderIPL::load(const std::string& filename) {
 
     return true;
 }
+
diff --git a/rwengine/src/loaders/LoaderIPL.hpp b/rwengine/src/loaders/LoaderIPL.hpp
index 5b636f36..4e543576 100644
--- a/rwengine/src/loaders/LoaderIPL.hpp
+++ b/rwengine/src/loaders/LoaderIPL.hpp
@@ -15,9 +15,12 @@ struct InstanceData;
 */
 class LoaderIPL {
 public:
-    /// Load the IPL data into memory
+    /// Load the IPL data from filename
     bool load(const std::string& filename);
 
+    /// Parse IPL data from the stream
+    bool load(std::istream& stream);
+
     /// The list of instances from the IPL file
     std::vector<std::shared_ptr<InstanceData>> m_instances;
 
diff --git a/tests/test_LoaderIPL.cpp b/tests/test_LoaderIPL.cpp
index 78640413..b766720f 100644
--- a/tests/test_LoaderIPL.cpp
+++ b/tests/test_LoaderIPL.cpp
@@ -4,21 +4,21 @@
 
 struct WithLoaderIPL {
     LoaderIPL loader;
+
+    std::ifstream test_data_stream {Global::get().getGamePath() + "/data/gta3.zon"};
 };
 
 BOOST_FIXTURE_TEST_SUITE(LoaderIPLTests, WithLoaderIPL)
 
 #if RW_TEST_WITH_DATA
 BOOST_AUTO_TEST_CASE(zone_count_is_correct) {
-    const auto& gdpath = Global::get().getGamePath();
-    BOOST_REQUIRE(loader.load(gdpath + "/data/gta3.zon"));
+    BOOST_REQUIRE(loader.load(test_data_stream));
 
     BOOST_TEST(loader.zones.size() == 42);
 }
 
 BOOST_AUTO_TEST_CASE(zone_data_is_correct) {
-    const auto& gdpath = Global::get().getGamePath();
-    BOOST_REQUIRE(loader.load(gdpath + "/data/gta3.zon"));
+    BOOST_REQUIRE(loader.load(test_data_stream));
 
     auto& zone1 = loader.zones[1];
     BOOST_TEST(zone1.name == "PORT_W");